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addressing issue #29156, converted ps to array before slicing #29175

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Merged
merged 4 commits into from
Dec 11, 2024
Merged

addressing issue #29156, converted ps to array before slicing #29175

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5a51e6a
converted ps to array before slicing
vicliu2001 Nov 23, 2024
bdf5514
added test cases for the modification to art3d.py
vicliu2001 Nov 23, 2024
6348165
modified test for _generate_normals
vicliu2001 Dec 7, 2024
3982428
changed plot.show to plot.draw
vicliu2001 Dec 7, 2024
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1 change: 1 addition & 0 deletions 1 lib/mpl_toolkits/mplot3d/art3d.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1218,6 +1218,7 @@ def _generate_normals(polygons):
v2 = np.empty((len(polygons), 3))
for poly_i, ps in enumerate(polygons):
n = len(ps)
ps = np.asarray(ps)
i1, i2, i3 = 0, n//3, 2*n//3
v1[poly_i, :] = ps[i1, :] - ps[i2, :]
v2[poly_i, :] = ps[i2, :] - ps[i3, :]
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13 changes: 12 additions & 1 deletion 13 lib/mpl_toolkits/mplot3d/tests/test_art3d.py
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Expand Up @@ -3,7 +3,7 @@
import matplotlib.pyplot as plt

from matplotlib.backend_bases import MouseEvent
from mpl_toolkits.mplot3d.art3d import Line3DCollection
from mpl_toolkits.mplot3d.art3d import Line3DCollection, Poly3DCollection


def test_scatter_3d_projection_conservation():
Expand Down Expand Up @@ -54,3 +54,14 @@ def test_zordered_error():
ax.add_collection(Line3DCollection(lc))
ax.scatter(*pc, visible=False)
plt.draw()


def test_generate_normals():
# Smoke test for https://github.com/matplotlib/matplotlib/issues/29156
vertices = ((0, 0, 0), (0, 5, 0), (5, 5, 0), (5, 0, 0))
shape = Poly3DCollection([vertices], edgecolors='r', shade=True)

fig = plt.figure()
ax = fig.add_subplot(projection='3d')
ax.add_collection3d(shape)
plt.draw()
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